Muscle Tissue

Muscles

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Biology Muscles , skeleton and skin give the body shape and form . But it 's the muscle tissues that clearly give the features and shape of the human body . Much effort is given to muscles that it has even become a large global industry just to maintain it

Among the specialized tissues in the body , the muscle tissue is highly specialized . Muscle tissues have contracting abilities and conducting abilities . Muscles are found to carry out electrical impulses . Voluntary muscles are differentiated from involuntary muscles . In terms of

br structure , muscles can either be striated or smooth . Muscles are commonly known as smooth , skeletal and cardiac

Different organs use different kinds of muscles . Small intestines have smooth muscles . Smooth muscles are neat and form parallel lines Intestine muscles are involuntary muscles . They contract without conscious thought . These muscles fit the intestines because digestion is not an act of will . Whether you like it or not , intestines will move according to the contents of your stomach either when they are full or empty . The uterus also has smooth muscles . Other organs such as the bladder , blood vessels and other internal organs also have involuntary muscles

Skeletal muscles are confused to be fibres of connective tissues Skeletal muscles are not of connective tissues because these muscles are not extracellular elements . These muscles describe the individual skeletal muscle cells . These tissues are fibres that are thin and very long . They almost look like threads like the one we see in clothing Under the microscope , these cells are cylindrical and unbranched . The nuclei of these tissues are neatly arranged that goes around the periphery of the cell . This neat and ly arrangement is made up of actin and myosin filaments found inside the muscle cell . Skeletal muscle cells that are arranged and form large bundles are called fascicles These bundles are enveloped with thin layers of connective . Continuous arrangements of these fascicles become parts of a particular muscle organ , for example biceps

Cardiac muscles are almost an integration of smooth muscles and skeletal muscles . These muscle tissues make up the wall of the heart They are striated and multinucleate like skeletal muscles however , they also seem to be smooth because their nuclei are located at the center and that a lot of cells are required to occupy the length of the muscle

It differs from both skeletal muscle and smooth muscle in that its cells branch and are joined to one another via intercalated discs Intercalated discs allow communication between the cells such that there is a sequential contraction of the cells from the bottom of the ventricle to the top , facilitating maximal ejection of blood from the ventricle during contraction . This occurs with out nervous innervation to each cell or group of cells . Cardiac muscle also differs from the other two muscle types in that contraction can occur even without an initial nervous input . The cells that produce the stimulation for contraction without nervous input are called the pacemaker cells (Ackerley , 2006